Pneumatic thread holder for multistack magazines



pril 27, 1948. G. N. PETERSON PNEUMATIG THREAD HOLDER FOB MLTISTACKMAGAZINES Filed April 2, 194'/ FIG. I

ATTORNEY wardly from edge 40 toward the magazine and verse of said weftends and within which subatmospheric pressures exist, said passagehaving a thread intake mouth formed with a curved surface convex towardthe magazine and along which the weft ends of one of said grOups aredistributed, and guide means fixed with respectto said holder meansspaced from said passage and having a curved edge convex toward themagavzine and farther from the latter than is said surfaces 52 and 53which may be in the same plane and are inclined downwardly and generallytoward the magazine. Both sets of inclined surl.

faces terminate above the plate 28 as shown in Figs. 4 and 5, althoughthis is not an essential relation, and top edge 42 has its' high point anearer the magazine than are adjacent parts of the horns, see Figs. 5and 10.

Fig. 10 illustrates the reasons for the relationships just described.When new bobbins are placed in the magazine their weft ends are drawntoward the holder and passed down between the horns 23 and 25. Therearmost position whichl can be assumed by any thread in group W isindicated by the light dot and dash line b which passes yin front ofpoint a on plate 28. As this thread slides down surface 5l it descendsalong edge 42 and slips under cusp like point 55 between edges l2 and4i@ to the heavy dot and dash line c, and when released will be drawnaround the latter edge and into passage 35. Obviously, a thread fromgroup W sliding down surface 5i)v of the front horn will not need to beguided by edge 42'.

Similarly, a thread from rear group W engaging the horn 5o in theposition of light solid line d, Fig. 10will slide down surface 50 and bebehind pcint a on plate 25. As this thread moves to the heavy solid lineposition `e it will be drawn into passage 35 along surface 36 whenreleased. Point a is thus seen to be so located relatively to the hornsand the directions in which the threads approach holder H from themagazine that the curved surface and along which the weft ends of theother groups are distributed and from which the second group enters saidpassage spaced from f the rst group.

2. In a pneumatic thread holder for a weft replenishing loom having twogroups of weft ends leading from a reserve bobbin magazine, threadholder means containing a thread passage transverse of said weftY endsand within which subatmospheric pressures exist, said passage having athread intake mouth formed with a curved surface convex toward themagazine and along which the weft ends of one of said groups areAdistributed, and'guide means fixed with respect to said holder meansspaced from said mouth and threads are automatically separated to lie inthev l corresponding compartment 46 or 41.

From the foregoing it will be seen that the two groups of threads areseparated by guide plate 28 and enter passage 35 along separate paths.Also, the threads of each group are separated from each other by thecurved edges or surfaces which they engage. The plate 28 divides thespace 45 into narrow compartments which by their proportions causestrong drafts of air to pass through them to hold the weft ends in theproper spaced relation. While a reciprocating air pump has been shown,the invention can also be used with a continuous suction.Furthermoraeach thread when cut at the cloth selvage subsequent totransfer of the corresponding bobbin Vcan be drawn promptly into passage35 with little or no entanglement with adjacent threads. The top ofplate 28, particularly the point a, relatively to the horns 23 and 24permitan automatic separation of the threads into their proper groupswhen placed downwardly between the horns, as explained in connectionwith Fig. 10. I

Having thus described my invention itv will be seen that changes andmodifications may be made therein by those skilled in the art withoutdeparting from the spirit and scope of the invention and I do not wishto be limited to the details herein disclosed, but what I claim is:

1. In a pneumatic thread holder for a weft replenishing loom having twogroups of weft ends leading from a reserve bobbin magazine, threadholder means containing a thread passage transhaving a curved edgeconvex toward the magazine and aligned with part Aof said passage spacedfrom said curved surface in a direction away from the magazine and alongwhich the weft ends of the other group are distributed and from whichthe second group enters said passage.

3. In a weft replenishing loomliaving a reserve bobbin magazine fromwhich front and back groups of weft ends extend, a pneumatic threadholder including a tube within which subatmospheric pressures exist,said tube having a threadv intake mouth the sider of which nearest tothe magazine is curved and convex toward the magazine, the weft ends ofthe back group being distributed along said curved side of the mouth andentering said mouth and tube, and a plate spaced forwardly from themouth and having a curved edge. convex toward the magazine along whichthe weft endsl of the front group are distributed and from which saidfront groupextends into said mouth and tube along paths beyond saidcurved side of the mouth with respect to the magazine. v

4. In a weft replenishing loom having a reserve bobbin magazine fromwhich front and back groups of` weft ends extend, a pneumatic threadholder including a tube within which subatmospheric pressures exist andhaving a thread intake mouthfacing transversely of the weft ends, theside of the mouth nearest to the magazine being curved and convex towardthe magazine and having the weft ends of the back group dis,

tributed therealong, and a guide having a curvedA edge concentric withsaid side of the mouth but farther from the magazine along whichthe'weft ends of the front group are distributed and from which thefront group enters the mouth spaced from the back group.

.Y 5.'In a weft replenishing loom having a re serve bobbin magazine fromwhich front and back groups of weft ends extend,v a pneumatic threadvholder including a tube within which subatmospheric pressures exist,two spaced thread guides having curved edges convex toward the magazineand at different distances from the magazine, the weft ends of the backgroup being distributed along one of said edges and entering the tubefrom said one edge, and the weft ends of the second group beingdistributed along the other curved edge and entering the tube from saidother edge and spaced from the rst group.

6. In a weft replenishing loom having a reserve bobbin magazine fromwhich front and back groups of weft ends extend, a pneumatic threadholder including a tube within which subatmospheric pressures exist andhaving a thread intake mouth, two spaced members defining between them athread space communicating with the mouth and extending toward themagazine and receiving the two groups of weft ends, and a guide in saidspace dividing the latter into front and back compartments, the backgroup entering the back compartment and entering the mouth directlytherefrom and the front group entering the front compartment andextending partly around said guide and across the back compartment andthen entering the mouth. t

7. In a weft replenishing loom having a reserve bobbin magazine fromwhich front and back groups of weft ends extend, a pneumatic threadholder including a tube within which subatmospheric pressures exist andhaving a thread intake mouth, spaced members defining between them athread space communicating with the mouth and extending toward themagazine and receiving the two groups of weft ends, a guide in saidspace dividing the latter into front and back compartments, the backgroup entering the back compartment and entering the mouth directlytherefrom and the front group entering the front compartment andextending partly around said guide and across the back compartment andthen entering the mouth, said guide being so located as to cause saidfront group to enter said mouth spaced from the back group in adirection away from the magazine.

8. In a weft replenishing loom having a reserve bobbin magazine fromwhich front and back groups of weft ends extend, a pneumatic threadholder including a tube within which subatmospheric pressures exist andhaving a thread intake mouth, front and back spaced members definingbetween them a thread space communicating with said mouth and extendingtoward the magazine, and a guide between said members dividing the spaceinto front and back compartments, the weft ends of the back groupentering the back compartment and bending laterally to enter said mouthdirectly and the weft end of the front group entering the frontcompartment and bending laterally around said guide and extending acrosssaid back compartment and then entering the mouth.

9. In a weft replenishing loom having a reserve bobbin magazine fromwhich front and back groups o1 weft ends extend, a pneumatic threadholder including a tube within which subatmospheric pressures exist andhaving a thread intake mouth, front and back spaced members definingbetween them a thread space communieating with said mouth and extending'toward the magazine, and a vertical separat-or between said memberslying between said groups of weft ends and having a top edge inclinedupwardly and toward the magazine, weft ends drawn from both of saidgroups when moved down between said members engaging said separator andbeing separated thereby into their respective groups, one for said backcompartment and the other for said front compartment.

10. In a weft replenishing loom having a reserve bobbin magazine fromwhich front and back groups of weft ends extend, a pneumatic threadholder including a tube within which subatmospheric pressures exist andhaving a 'thread intake mouth, front and back spaced vertical membersdefining between them a thread space communicating with said mouth .andextending toward the magazine, and a guide between said member dividingthe space into front and back compartments, said guide having a top edgeinclined upwardly and toward the magazine, a weft end derived fromeither group when moved down along the member corresponding to the othergroup engaging said top edge and being deected thereby toward thecompartment corresponding to the weit end.

11. In a weft replenishing loom having a reserve bobbin magazine fromwhich front and back groups of weft ends extend, a pneumatic threadholder including a tube within which subatmospheric pressures exist andhaving a thread intake mouth, front and back spaced vertical membersdefining between them a thread space communicating with said mouth andextending toward the magazine, and a guide between said member dividingthe space into front and back compartments, said guide having a top edgeinclined upwardly and toward the magazine, a weft end of the back groupwhen moved down along the front member engaging said top edge and beingdeected thereby toward the back compartment, and a weft end of the frontgroup when moved down along the back member engaging said top edge andbeing deflected thereby toward the front compartment.

GEORGE N. PETERSON.

REFERENCES CITED The following references are of record :in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 2,360,177 Turner Oct, 10, 19442,387,302 Santori Oct. 231, 1945 2,401,593 Wakefield June 4, 1946

